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IGCSE stuffs > Physics Formulas > Flashcards

Physics Formulas Flashcards

1
Q

Speed?

A

Speed = Distance/time

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2
Q

Velocity?

A

Velocity = displacement/time

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3
Q

Accelaration?

A

Accelaration = Final velocity-initial velocity/time

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4
Q

Weight?

A

Weight = Mass * gravity

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5
Q

Newtons second law?

A

Force = Mass * Accelaration

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6
Q

Extension or a spring?

A

Extension = final length - initial length

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7
Q

Explain K = F/X

A

K stands for a constant as Force (F)/extension (X) is constant until the limit of proportionality

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8
Q

Momentum?

A

Momentum (P) = mass*velocity

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9
Q

Impulse?

A

Impulse =
Final momentum (mv) - initial momentum (mu)
Or Force*Time (N/s)

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10
Q

Workdone?

A

WD = Force * distance

WD is also change in energy (GPE, Ke etc)

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11
Q

Kinetic energy?

A

1/2mass * velocity squared

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12
Q

Gravitational potential energy?

A

Mass * gravity * height

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13
Q

Power?

A

Workdone/time (J/s) (W)

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14
Q

Efficiency?

A

( Useful energy output/total energy input ) * 100

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15
Q

Pressure?

A

Force (N)/ area (m^2)

1Nm^2 = 1 Pa

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16
Q

Liquid pressure?

A

LP = Height * density * gravity strength

17
Q

Kelvin and Celsius?

A

Kelvin –> Celsius we -273 degrees

Celsius –> Kelvin we +273 degrees

18
Q

Boyles law?

A

P1V1 = P2V2

when temp constant

19
Q

Charles law?

A

V1/T1 = V2/T2

20
Q

Ussac law??

A

P1/T1 = P2/T2

21
Q

Heat transferred?

A

Heat transferred (J) = mass (kg) * specific heat capacity (J/kg/c) * change in temperature (K or C)

22
Q

Refractive index?

A

Sin i/Sin r = n2/n1 = n

N = C/V (C = speed of light in medium and V = speed of light in vacuum (3*10^8 m/s)
no units because it is a ratio)

23
Q

Density?

A

Mass/volume

24
Q

Rate of change in momentum?

A

Mv-Mu/t
or
MA (mass*accelaration) = Force

25
Q

Moment?

A

F*perpendicular distance from pivot (Nm)

IGCSE stuffs (9 decks)

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